Noel chandler



(No Model.) 2 Sheets-Sheet 1.

N. CHANDLER. GUT-OFF GEAR FOR ENGINES.

No. 428,453 Patented May 20, 1890.

A eulm Noel. ekomller (known e (No Model.) 2 sheets sheet 2.

V N. CHANDLER.

GUT-OFF- GEAR FOR ENGINES.

'No. 428,453. PatentedMay 20; 18.90,

AT) mi 0 V Noel Q/KMQAM Nrrn STATES Fries.

COUNTY OF STAFFORD, ENGLAND.

CUT-OFF GEA R FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 428,453, dated May 20, 1890.

Serial No. 805,328. (No model.)

To all whom it may concern.-

Be it known that I, NOEL CHANDLER, a subject of the Queen of Great Britain and Ireland, residing at Hednesford, in the county of Stafford, Kingdom of Great Britain and Ireland, have invented Improvements in Automatic Cut-Off Gears for Steam Engines, of which the following is a specification.

This invention relates to automatic cut-off gears for steam-engines of the kind in which the eccentric which operates the d istributingvalve has its position on the crank-shaft varied by the action of a centrifugal governor which is mounted upon and rotates with the said shaft.

In an automatic cut-off gear according to this invention the eccentric has its eye slotted out, so that it can be moved relatively to the shaft to alter the amount of its stroke. It is carried by a pin, which passes through the eccentric and within the circumference of the eccentric-strap, and which pin projects through an extension of one of the crankwebs, or which is carried by a disk or arm secured to the shaft. The position of the eccentric is regulated by a governor. This governor consists of two weights pivoted to the above-mentioned plate and connected by links to extensions of the eccentric. When the governor is in rotation, the centrifugal force of the weights tends to move the eccentric in one direction relatively to the shaft in opposition to the force of two adjustable springs, each connected ,at one end to the above-mentioned plate and at the other end to an arm or ear 011 the weight. The governor is so arranged that it occupies no more space on the shaft than the thickness of the crank-arm (longitudinally) Referring to the annexed two sheets of drawings, Figure 1 is a side elevation of an automatic cut-off gear according to this invention; and Figs. 2 and 3 are two front elevations, the former showing the parts in positions corresponding to the latest cut-off and the latter in positions corresponding to the earliest cutoff for which the gear is designed.

The eccentric 1 is not keyed on the crankshaft 2, but has an elongated curved eye, so

that it can be moved with relation to the shaft. It is pivoted on a pin 3, which passes through an extension of one of the crankwebs (serving as a counter Weight) and through a plate 4: behind it. The eccentric can move on this pin to the extent allowed by its eye. Connected with the eccentric are two arms or horns 5 5, each of which is connected by a link 12 to a weight 6, pivoted on a pin 7, fixed to the plate 4. To each weight 6 there is pivoted a 'pin 8, which passes through a guide 9. Around this pin is a spring 10, which is compressed when the weights move outward under centrifugal force from the position in Fig. 2 to that of Fig. 3 to alter the stroke of the eccentric. The compression of the springs can be varied by means of the nuts 11 11. 13, Fig. 1, is the eccentricstrap, and 14 the eccentric-rod, by which the distributing-value is operated. The cut-off of the steam is rendered earlier as the speed increases and the weights fly out, the lead re maining constant.

l/Vhat is claimed is 1. In an automatic cut-oft gear, the combination of an eccentric having an elongated eye for the passage of a driving-shaft, arms or lugs in one with or directly connected to said eccentric, apin driven from the drivingshaft, and whereon said eccentric isj ournaled at a point within the bearing of the eccentricstrap, weights subjected to centrifugal force and to the force of springs, the two forces acting in opposite directions, and a support fixed to the driving-shaft, said weights being jointed to said support and connected to said arms or lugs on said eccentric, substantially as herein described.

2. In an automatic cut-off gear, an eccentric 1, pivoted on a. pin 3, carried by an extension ofone of the crank-arms and arranged to pass through the eccentric at a point within its circumference,in combinationwithweights 6 6, connected tosaid eccentric and subject to centrifugal force and to the force of springs,

IOO

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.-

NOEL CHANDLER.

' \Vitnesses:

W. H. HARRIS, Not. Pub, 47 New Street, BtrminghcmmEngland.

HENRY BREWIN, 47 New Street, Btwntnghcmz, England, his

clerk. 

